Before he left for a brief European visit, symphony conductor Sir Alfred De Carter casually asked his staid brother-in-law August to look out for his young wife, Daphne, during his absence. August has hired a private detective to keep tabs on her. But when the private eye's report suggests Daphne might have been canoodling with his secretary, Sir Alfred begins to imagine how he might take his revenge.
Unfortunately the movie Unfaithfully Yours is not yet available on HBO Max.
| Writing | Preston Sturges | Screenplay |
| Directing | Preston Sturges | Director |
| Camera | Victor Milner | Director of Photography |
| Editing | Robert Fritch | Editor |
| Production | Preston Sturges | Producer |
| Costume & Make-Up | Bonnie Cashin | Costume Design |
| Art | Paul S. Fox | Set Decoration |
| Art | Thomas Little | Set Decoration |
| Costume & Make-Up | Oleg Cassini | Costume Design |
| Sound | Roger Heman Sr. | Sound |
| Art | Lyle R. Wheeler | Art Direction |
| Art | Joseph C. Wright | Art Direction |
| Editing | Stuart Gilmore | Editor |
| Directing | Gaston Glass | Assistant Director |
| Sound | Arthur von Kirbach | Sound |
| Costume & Make-Up | Henry Vilardo | Makeup Artist |
